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Digital Electronics

Digital Electronics
ASCII code is a

 10-bit code
 5-bit code
 7-bit code
 8-bit code

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Digital Electronics
What logic function is produced by adding inverters to the inputs of an OR gate?

 X-NOR
 NOR
 NAND
 AND

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Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:1
 2:3
 1:2
 1:1

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Digital Electronics
The number of digit 1 present in the binary representation of (3 × 512 + 7 × 64 + 5 × 8 + 3) is

 6
 7
 8
 9

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to positive logic system.

 5 V and 0 V
 –1.5 V and – 5 V
 0 V and 5 V
 1 V and -5 V

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Digital Electronics
Extended Binary Coded Decimal Interchange Code is an ________ bit code.

 32
 16
 7
 8

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